June 2016: extreme rain

Photo of Namoi River in high flow

Namoi River Fresh

This was the fifth wettest June in history, and had the second coldest day in this century.
Average temperatures were several degrees high until the last week, when they fell to three degrees low. In times of cloud and rain, cold days followed warm nights; at other times warm sunny days followed cold nights. There was one extremely warm night and one extremely cold day. The night before the 19th did not get cooler than 12.8°, making it the 5th warmest June night in this century. On the 27th the maximum temperature was only 8.5°: the second coldest day in this record from 1999. People remember the Friday before Queen’s Birthday in 2007 being bitterly cold, but that day reached 8.8°. The 20th of that month was the coldest, reaching only 8.3°.
This month, there were 8 frosts (usually 13) the coldest night being -1.8° in the screen.
Rain fell on 17 days, one day short of the record number here in any month (18 in June 1950!). The highest reading was 37.0 mm recorded on the 5th. As in May, the afternoon humidity was very high (seldom below 50%).

Weather log for June 2016

Comparing June months

The mean daily maximum temperature (16.4°) was very low, just not nearly as low as in June 2007 (14.3°). On the other hand, the mean daily minimum temperature (5.8°) was very high, as it was in June 2005, 2008, 2009, and 2013. The average temperature for the month (11.1°) was 0.8° above normal. Similarly, the subsoil temperature (16.8°) was 1.5° above normal.
The daily temperature range, normally 15.0°, was 10.6°, the narrowest yet seen in June, narrower than in 2007. Skies were rather cloudy, and the dew point normal.
The phenomenal rainfall of 114.8 mm was in the 97th percentile. There have been four wetter June months since 1883, but they were all before 1931. Thus, this is the wettest June in 86 years! Now, the greatest rainfall “shortage” is the 36-month total (1636 mm) which is in the 16th percentile. Greenhatch Creek is barely flowing, and a neighbour’s dam is almost full.

Climate for June 2016


Data. Rainfall figures for this month are from the automatic rain gauge at Manilla, published on the internet by the Bureau of Meteorology as Station 55031. All other data, including subsoil at 750 mm, are from 3 Monash Street, Manilla.

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